Hydrogen diffusion in a Fe/VHc superlattice measured with Quasi-Elastic Neutron Scattering
We propose to measure hydrogen diffusion in a Fe/VHx [2/14] superlattice with quasi-elastic neutron scattering. Hydrogen is one of the major candidates to replace carbon based fuels with sustainable energy sources. Both thermodynamics and kinetics of hydrogen-metal systems are greatly altered by mechanical influences such as strain, finite size (down to the nano regime) and proximity to interfaces. Single-crystal superlattices, for example Fe/V and Cr/V represent one of the most highly controlled class of model systems to investigate these effects, since they can be grown to high quality and only one of the constituents absorbs hydrogen (vanadium). We have estimated the count rate expected for a hydrogen concentration of c=0.65 H/V and found that an experiment on IN12 or Thales is feasible. Our experiments are the first of its kind on thin films loaded with hydrogen. If they are successful, they will open the door towards a series of studies of diffusion in thin films where effects of finite size, strain engineering and proximity can all be studied.
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PALSSON Gunnar; DROULIAS Sotirios; HJOERVARSSON Bjoergvin; KITCHEN Brian; KOZA Michael Marek; MOOIJ Lennard; WOLFF Maximilian and ZBIRI Mohamed. (2016). Hydrogen diffusion in a Fe/VHc superlattice measured with Quasi-Elastic Neutron Scattering. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.7-03-149
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